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How to use Tetrasodium EDTA?
Hi all,
I’m familiar with GLDA, but I’ve never used this chelating agent before. I have it in a powder form, and I was wondering how to use it? Do I need to make a 50% solution or can I add it to the water phase as is when formulating?
Another thing I use some help with please is using parabens. I bought a preservative that has a mixture of phenoxy + ethyl, propyl, butyl and methyl paraben in a solution. I’d imagine this would be effective against YMF, gram + & - bacteria? If so, how to figure out the appropriate usage rate? Supplier says between 0.25% to 1%, but I know they want you to use more to buy more from them
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10 Replies
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Assume you’ve Phenonip or a similar preservation combination. This should be effective.
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Correct, only mine doesn’t have isobutyl paraben mixed in it.
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good
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I make a 20% EDTA solution and use that.
Use the preservative at highest amount allowed
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If I were to use 20% edta solution, what would be the usage rate for it when formulating? Is it 0.2% (0.04% active)?
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1%( 0.2% active)
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Thanks @Abdullah
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Both disodium and tetrasodium dissolve in water if you heat it. I never bother with preparing solutions and use them as recommended by the supplier depending in the formula.
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Tetrasodium EDTA dissolves readily in water without applying heat. Very easy to use.
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Agree with @Cafe33
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